Read the two excerpts from section 3 of "An Occurrence at Owl Creek Bridge."

Then all at once, with terrible suddenness, the light about him shot upward with the noise of a loud splash; a frightful roaring was in his ears, and all was cold and dark. The power of thought was restored; he knew that the rope had broken and he had fallen into the stream.
***
As he is about to clasp her he feels a stunning blow upon the back of the neck; a blinding white light blazes all about him with a sound like the shock of a cannon—then all is darkness and silence!
What does the motif of a loud sound represent in the story?